Lifting device for well-tubing



(No Model.)

0. S. MICHAEL. LIETING DEVICE EOE WELL TUBING.

N0. 598,527. Patented Feb.' 8, `1898.

OLIVER S. MICHAEL, OFWALDO, KANSAS.

LlFTlNG DEVICE FOR vd/ELLKTUBING.

SPECIFICATION forming part of Letters Patent No. 598,527, dated February8, 1898. Applicationled August 10, 1897. Serial No. 647,707. (No model.)

T all whom t may concern: 4

Be it known that I, OLIvER S. MICHAEL, a citizen of the United States,residing at Waldo, in the county of Russell and State of Kansas, haveinvented a new and useful Lifting Device for wWell-Tubing, of which thefollowing is a specication.

My invention relates to a lifting device for pump-tubing, drill-rods,and the equivalents thereof, and has for its objects to provide asimple, inexpensive, and efcient apparatus adapted to engage and elevatea device of the class named without injury to the surface thereof and toprovide yielding means for maintaining the engaging devices in operativecontact with the object to be elevated.

A further object of the invention is to provide suitable means ofadjustment, whereby the parts of the apparatus may be suited to the diameter-of the tubing to be manipulated.

Further objects and advantages of this invention will appear in thefollowing description,and the novel features thereof will beparticularly pointed out in the appended claims.

In the drawings, Figure 1 is a longitudinal section of a lifting deviceconstructed in accordance with my invention. Fig. 2 is a plan view ofthe same, partly broken away. Fig. 3 is a partial side view to show theoperating devices and the means for preventing backward rotationthereof.

. Similar numerals of reference indicate correspondingparts in all thefigures of the drawings.

The frame comprises terminally-connected side walls 1 and 2 and a flooror base 3, and 4 designates a driving-shaft mounted in bearings on thesidewalls and terminallyprovided with a crank-arm 5 or equivalent meansfor communicating rotary motion to the shaft. Also mounted in bearingson the side walls and arranged parallel with the driving-shaft is adriven shaft 6, having a gear 7, with which meshes a pinion 8 on thedriving-shaft, a clutch device, consisting in the constructionillustrated of a pawl or dog 9, being arranged in operative relationwith the pinion to prevent backward rotation thereof.

Between the walls of the frame the driven shaft carries conicalsuperficially-serrated feed-wheels 10, having their smaller or reducedends arranged contiguous to each other,

whereby7 the coacting faces of the combined wheels form a V-shaped seatto receive a pump-rod or equivalent device, (shown at 11.)

Cooperating with the feed-wheels is a peripherally-grooved pressure-roll12, mounted between parallel bearing-ears 13 on a plunger 14, which ismounted to slide between and parallel with the side walls of the frameand is preferably provided with lateral guide-ears 15, engaginglongitudinal guide-slots 16 in said side Walls. This plunger is providedwith parallel rearwardly-extending guide-rods 17, extending throughguide-openings 18 in the end wall of the frame, and plunger-actuatingsprings 19 are coiled upon the guide-rods and bear against the rear sideof the plunger to hold the latter yieldingly advanced, with thepressure-roll in contact with the opposite side of a tube or rod fromthat with which the feedwheels are engaged. In order that the tension ofthe actuatingsprings may be varied to suit the diameter of the tube orrod to be elevated, I provide a follower 20, which is mounted to slidebetween and parallel with the side walls of the frame and arranged toreceive the rearward pressure of the actuating-springs, said followerbeing provided with suitable openin gs,throu gh which the guide-rods ofthe plunger project, and an adj usting-rod 2l, threaded in a suitablenut 22 in the end wall between the guide-rods and provided with anexposed crank-arm 23. It is obvious that by turning the adjusting-rodthe follower may be advanced or retracted to vary the tension of theactuating-springs and hence vary the pressure of the roll 12 upon thetube or rod to be elevated.

The side wall 2 is provided with an opening 24, registering with a slot25 in the floor or bottom of the frame, whereby the appara-- tus may beapplied to a tube or rod to be elevated by laterally moving the frametoward said rod and causing it to enter through the opening 24 and slot25. Having thus applied the machine to the tube or rod and arranged thelatter between the cooperating faces ofthe pressure-roll andfeed-wheels, the drivingshaft is rotated to ,cause the rotation of thefeed-wheels in the direction necessary to elevate the tube or rod, andinasmuch as "the pressure of the roll is yieldingly held in contact withthe tube or rod it is adapted to re-l IOO cede at the couplings orunions to allow the latter to pass without releasing the tube or rod. Itis obvious that a tube or rod may be lowered by the same mechanism, theoperation thereof being reversed.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the spirit orsacrificing any of the advantages of this invention.

Having described my invention, what I claim isl. An apparatus of theclass described,hav inga supporting-frame, frictional feed-wheels andmeans for communicating motion thereto, aspring-actuated plunger mountedto slide toward and from the feed-wheels, a peripherally-groovedpressure-roll carried by the plunger, a follower disposed to receive thebackward thrust of the plunger-actuating springs, and means consistingof a cranked feed-rod and a fixed feed-nut for advancing the follower tovary the tension of said springs, substantially as specified.

2. An apparatus of the class described having a frame provided with alateral opening by which it maybe applied toa tube or rod, cooperatingperipherally-serrated conical feedwheels arranged with their reducedends in contiguity, a driving-shaft geared to the spin- -dle of thefeed-wheels, a clutch device for preventing backward rotation of thedrivingshaft, a plunger mounted to slide in the frame and carrying apressure-roll to coperate with the feed-wheels and bear against theopposite side of a tube or rod engaged by said wheels,

guide-rods on the plunger, actuating-springs coiled upon the guide-rodsto advance the plunger, a follower mounted to slide in the frame in rearof the plunger and receiving the backward thrust of theplunger-actuating springs, and means for advancing the follower to varythe tension of the actuating-springs, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

OLIVER S. MICHAEL.

Witnesses:

A. S. OooK, H. W. MICHAEL.

